Oscillator system



March 31, 1936.

w. SOLLEIR 2,035,574

OSCILLATOR SY STEM Filed Sept. 25, 1934 IN VEN TOR.

BY 6 G ATTORNEY UNITED STATES PATENT a OFFICE OSCILLATOR SYSTEM Walter Soller, Tucson, Ariz., asignor .of one-half to William H. Woodin, Jr. Tucson, Ariz.

Application September 25, 1934, Serial No. 745,461

12 Claims. 250-36) My invention relates broadly to oscillation gen-- eration systems and more particularly to a circuit arrangement for the production of oscillations employing a cathode ray discharge tube.

This application is a continuation in part of Number 690,907, filed Sepmy application Serial tember 25, 1933 and entitled Electron tube system.

One of the objects of my invention is to provide an oscillation system in which high speed scanning by an electron beam may be controlled.

Another object of an oscillation system tube is employed f0 oscillations.

Still another object of my invention is to provide an arrangement of oscillation generator operative over a wide frequency .range and employing a cathode ray discharge tube.

' A further object of my invention is to provide a deflection type cathode ray discharge tube having means for controlling the electron discharge therein according to the amount of the load supplied by the oscillation circuit.

Another object of my'invention resides in the circuit arrangement for a cathode ray discharge tube employing both a deflection system and a space charge control grid for in which a cathode ray the generation of sustained Other and further objects of my invention reside in the circuit tion system employing a cathode ray discharge tube, as set forth more fully in the specification hereinafter following by reference to the accompanying drawing. in which:

Figure 1 diagrammatically and schematically shows one circuit arrangement embodying my invention in which the trated partially in section and partially in side elevation; Fig. 2 is a fragmentary plan view ofthe cathode ray tube illustrated in Fig. 1 partially broken away to illustrate the arrangement of electrodes therein; Fig. 3 is a cross-sectional view taken on line 3-3 of Fig. 1 showing the arrangement of anodes; and Fig. 4 shows a modifled form of cathode ray tube oscillating circuit embodying invention.

Referring t character I designates the envelope of the cathode ray tube preferably of glass and exhausted to a high degree of vacuum or fllled-with a gas or vapor of any desired composition. character 2 designates a cathode element having heating means such as filament 3 connected to any suitable source of potential through leads my invention is to provide- Y controlling the. oscillating condition of the cathode ray discharge tube arrangement for an oscilla-' cathode ray tube is illusthe drawing in detail, reference Reference prises'anode members 9 and I0 which are spaced 10 from each other edge to edge by a gap l2. The oscillation circuit of my invention employs a special transformer indicated at M having a pair of primary-windings l5 and I6 and a pair of secondary windings I1 and Hi. The primary 15 windings l5 and [6 have their inner ends connected together, as indicated at l9, and their remote ends respectively connected to anodes 9 and ID. A circuit is provided between cathode 2 and point l9 in the primary circuit through source of 20 potential 20. A connection is taken from cathode 2 through source of potential 1 to the formative anode 5 for impressing upon formative anode 5 apositive potential. The beam of electrons indicated at H is thus projected from cathode 2 25 through the positively charged formative anode 5 to the anodes 9 and ill, the beam of electrons normally being substantially confined to the gap l2 between the anodes 9 and It). In order to provide for the deflection of the electronbeam 30 alternately from one anode to the other, I provide deflection means and a control grid for varying the electron beam according to the output load. A pair of deflection coils or magnetic control windings 2i and 22 are mounted on opposite sides of the envelope I for establishing a magnetic field of such shape as to efficiently embrace an electron beam. The magnetic field is established along an axis normal to the axis of the electron beam II. The magnetic fleld tends to deflect the 40 electron beam up or down according to the direction of the magnetic field. The control coils 2| and 22 may or may not be mounted upon a magnetic core. In Fig. l, I have shown my invention as applied to a highfrequency oscillatory systemin which there is no magnetic core structure employed to support the deflection coils 2i and 22, thus insuring the highfrequency operation of the deflection coils. The secondary winding i8 of transformer l4 connects with the oscillation circuit constituted by magnetic control coils 2| and 22 and condenser, 23. In addition to the influence of the deflection coils upon the, beam I I, I provide means for varying the electron stream in accordance with the output load com-' the 5 55 of the magnetic coils 'the'electron beam prising the control grid 24 interposed in the path of the electron discharge. The control grid 24 is connected in a path extending from cathode 2 through resistance 25 and source of potential 26. Source of potential 26 tends to impress a negative potential on control grid 24 but the effective potential on control grid 24 iscontrolled by the potential drop across resistance 25. The

potential drop across resistance iscontrolled in proportion to the output load which connects across resistance28. The output circuit of rectispace charge The alternating current fler tube 23 is shunted by condenser 40 which,

in turn, connects with resistance 25 which is.

of such value that the bias across condenser 40 varies in proportion to variation in the load.

load builds up a potential across resistance 28. The potential across resistance 28 is rectified and delivered to the circuit including resistance 25. Inasmuch as resistance 25 is in circuit with the control grid 24, the bias impressed upon control grid 24 will change according to the change in potential across resistance 25, which, in turn, is controlled by the output load. In this way, the control grid 24 serves to change the total amount of electrons projected in electron beam This prevents the oscillating tube from drawing a large amount of power when only a small load is to be driven. The input of the oscillator will vary with the output in this arrangement. The deflection regeneration system coacts with the space charge control grid system in the generation of and in the control of the required oscillatory energy.

The primary I current is amounts of electrons fall on anodes 9 and *for example, in the position of electron beam A II is deflected up.

through the transformer l4 and as the electron illustrated in the drawing. As the electron beam current goes in beam H. isdeflected down, current goes in the opposite direction in transformer |4, thereby producting alternating current. The frequency of oscillation is controlled by adjusting the value of inductance in windings 2 and 22 and thesize of condenser 23.

- Fig. 2 illustrates more clearly the arrangement- 2| and 22 with respect to and Fig. 3 shows the dis- 4 position of the elements 9 and in the anode audio frequency oscillations.

. ment, I provide of the formative assembly 8. I

Fig. 4 shows one arrangement for employing a cathode ray discharge tube for the generation of In this arrangea control grid member 30 in lieu anode 5 and charge the control grid member 30 at positive potential for controlling the bombardment of anodes 9 and I0 by electron beam |l. In this arrangement, I provide an iron core transformer 34 having primary windings 35 and 35 interconneeted at 33 and connected with cathode 2 through potential source 23. Primary windings-35 and 35 havetheir remote ends connected with anodes" 9 and I3. Transformer 34 includes an iron core structure 'and secondary-windings 31 and 33. Secondary winding 38 connects to the oscillatory system indelivered to the output,

zero when equal ID as,

one direction eluding magnetic control coils 2| and 22 and condenser 23. Secondary winding 31 connects to the output circuit of the oscillator. As in the arrangement illustrated in Fig. 1, the deflection of the electron beam up and down causes variable and alternate excitation of the primary windings 35 and 36 producing alternating current in output winding 31. The coils 2| and 22 are wound so that the magnetic field is approximately in phase with the primary current through transformer 34. The values of inductances 2| and 22 and condenser 23 are such that audio frequency currents are delivered to the output circuit 31.

The tube shown in Fig. 4 may be constructed to operate as a mercury vapor or ionized gas tube in lieu'of the electronic arrangement as shown.

While I have described my invention in certain preferred embodiments, I desire that it be understood that modifications may be made and that no'limitations upon my invention are intended other than are imposed by the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

1. In a cathode ray control system,-a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment' output system for controlling the power input of I said discharge device.

2.In a cathode ray control system. a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair. of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, and a plurality of means connected with ,said branch circuits, one of said meansjor determining the frequency of oscillations which may be sustained in said circiilts, and the other of said means for controlling the intensity of said cathode ray in accordance: with the load on said system.

3. In a cathode vessel, a cathode ray ray control system, a closed discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray devi'ce'and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a pair of electromagnetic windings disposed adjacent the path of said cathode ray, and connections between said branch circuits and said electromagnetic windings for effecting sustained oscillations in said circuits, and means coupled with said output system for trolling the intensity of of said cathode ray in vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, an electromagnetic device disposed adjacent the path of said cathode ray and connected with said branch circuits, and a condenser connected with said electro-magnetic device and cooperating therewith in determining the frequency of oscillations sustained-by said circuits, and means coupled with said output system for controlling the-intensity of said cathode ray in accordance with the load.

5.,In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a pair of electromagnetic windings aligned one with the other and disposed on opposite sides of the path of the cathode ray, said windings being connected with said branch circuits and effective to deflect said cathode ray,- a load circuit connected .with each of said branch circuits, and means connected with said load cir'- cuit for varying the intensity of said cathode'ray in accordance with the load.

6. In a cathode ray control system, a closed 'vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a pair of electromagnetic windings aligned one opposite sides of the path of said cathode ray, saidwindings being connected with said branch circuits and efiective to deflect said cathode ray, a load circuit inductively coupled with both of said branch circuits, and means connected with said load circuit for varying the intensity of said cathode ray in accordance with the load.

7 7, In a cathode my control system, a closed vessel, a. cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray discharge device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a load circuit, means connected with said load circuit for conmeans coupled with said branch circuits for controlling the deflections of said cathode ray for sustaining oscillations in said load circuit.

with the other and disposed on tem connected with said cathode said cathode ray, and

8. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device'to said plate assembly, an output system connected with said cathode ray discharge device and including a source of potential and separate branch circuits leading to the clements of said plate assembly, a load circuit, a space charge grid disposed in the path of said cathode ray within said vessel, means connected between said load circuit and said space charge grid for-controlling said cathode ray in accordance with the operation of said load circuit, and means connected with said load circuit and disposed adjacent the path of said cathode ray for sustaining oscillations in said load circuit.

9. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said ,vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate branch, circuits leading to the elements of said plate assembly, a load circuit coupled with said branch circuits for receiving oscillatory current from said branch circuits, a resistance element connected in said load circuit, a rectifier element and a second resistance element connected in series across said first mentioned resistance element, a space charge control grid disposed in said vessel, a connection from one end of said second resistance element to control grid and a connection from the other end of said secondresistance element to said cathode ray discharge device whereby said grid is biased for controlling said cathode ray inaccordance with the load in saidload circuit, and means coupled with said load circuit and disposed adjacent the path of said cathode ray for controlling said cathode ray and sustaining oscillations in said load circuit.

said space charge vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output sysray device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a load circuit coupled with said branch circuits, a space charge control grid in said vessel, means for normally biasing said spacecharge control grid, and-means for deriving an additional potential from said load circuit for controlling the operation of said space charge control grid in'accordance with the load connected with said load circuit.

11. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device,'said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly an output system connected with said cathode ray discharge device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a load circuit coupled with said branch circuits, a space charge control grid in said vessel, means for normally biasing said space charge control grid, means for deriving an additional potential from said load circuit for controlling the operation of said space charge control grid in accordance with the load connected with said load circuit, and means connected with said load circuit and disposed adjacent the path of said cathode ray for sustaining oscillations in said load circuit.

12. In acathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray deviceposed on opposite sides of the path of said cathode ray and coupled with said load circuit and coacting with the operation of said branch circuits for sustaining oscillations in said load circuit.

WALTER SOLLER. 

